I was in elementary school in the 1980's, and we could check out this series of books from our library. I'm almost positive they were written by a husband and wife, and they were thin paperbacks with very colorful illustrations. The one I remember most had a purple cover with gray unicorns on it, and I think it was about a princess and a unicorn. I believe another one was green with a very cute dragon on it, that had a name I can't remember. They were all of this fantasy genre. It's driving me crazy, and I can't find anyone who remembers them!
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